<template>
<div class="goodslist-container">
    <transition @before-enter="beforeenter"
                @enter="enter"
                @after-enter="afterenter">
    <div class="ball" v-show="ballFlag" ref="ball"></div>
    </transition>
    <div class="mui-card">
        <div class="mui-card-content">
            <div class="mui-card-content-inner">
                 <swiper :lunbotuList="lunbotuList" :isfull="false"></swiper>
            </div>
        </div>
    </div>
    <div class="mui-card">
        <div class="mui-card-header">{{goodsinfo.title}}</div>
        <div class="mui-card-content">
            <div class="mui-card-content-inner">
                <p class="price">
                    市场价：<del>￥{{goodsinfo.market_price}}</del>&nbsp;&nbsp;销售价：<span class="now_price">￥{{goodsinfo.sell_price}}</span>
                </p>
                <p>购买数量:<numbox @getcount="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox></p>
                <p>
                    <mt-button  size="small" type="primary" @click="">立即购买</mt-button>
                    <mt-button  size="small" type="primary" @click="addToShopCar()">加入购物车</mt-button>
                </p>
            </div>
        </div>
    </div>
    <div class="mui-card">
        <div class="mui-card-header">商品参数</div>
        <div class="mui-card-content">
            <div class="mui-card-content-inner">
                <p>商品货号：{{goodsinfo.goods_no}}</p>
                <p>库存情况：{{goodsinfo.stock_quantity}}个</p>
                <p>上架时间：{{goodsinfo.add_time | dataFormat}}</p>
            </div>
        </div>
        <div class="mui-card-footer">
            <mt-button  size="large" type="danger" @click="godesc(id)">图文介绍</mt-button>
            <mt-button  size="large" type="danger" plain @click="gocomments(id)">商品评论</mt-button>
        </div>
    </div>
</div>
</template>

<script>
import swiper from '../subcomponents/swiper.vue'
import numbox from '../subcomponents/goods_numbox.vue'
export default {
    data(){
        return{
            id:this.$route.params.id,
            lunbotuList:[],
            goodsinfo:{},
            ballFlag:false,
            selectedCount:1
        }
    },
    created(){
        this.getLunbo();
        this.getGoodsInfo();
    },
    methods: {
        getLunbo(){
            this.$http.get('api/getthumimages/'+this.id).then(result =>{
                if(result.body.status === 0){
                    /* 提供另一种思路解决swiper组件中定义死src为item.img
                    result.body.message.foreach(item =>{
                        item.img = item.src;
                    }); */
                    this.lunbotuList = result.body.message;
                }
            })
        },
        getGoodsInfo(){
            this.$http.get('api/goods/getinfo/'+this.id).then(result =>{
                if(result.body.status === 0){
                    this.goodsinfo = result.body.message[0]
                }
            })
        },
        godesc(id){
            this.$router.push({name:"goodsdesc",params:{id}})
        },
        gocomments(id){
            this.$router.push({name:"goodscomment",params:{id}})
        },
        addToShopCar(){
            this.ballFlag =!this.ballFlag;
            //拼接出一个要保存到vuex.store中的对象
            var goodsinfo = {
                id:this.id,
                count:this.selectedCount,
                price:this.goodsinfo.sell_price,
                selected:true};
            this.$store.commit('addtocar',goodsinfo);
        },
        beforeenter(el){
            el.style.transform = "translate(0,0)";
        },
        enter(el,done){
            el.offsetWidth;
            /* 获取小球在页面中的位置 */
            const ballPosition = this.$refs.ball.getBoundingClientRect();
            const badgePosition = document.getElementById('badge').getBoundingClientRect();
            const xDist = badgePosition.left - ballPosition.left;
            const yDist = badgePosition.top - ballPosition.top;
            el.style.transform = `translate(${xDist}px , ${yDist}px)`;
            el.style.transition = "all 1s cubic-bezier(.4,-0.3,1,.68)";
            done()
        },
        afterenter(el){
            this.ballFlag = !this.ballFlag
        },
        getSelectedCount(count){
            this.selectedCount = count;
        }
    },
    components: {
        swiper ,
        numbox   
    }
}
</script>

<style lang="scss" scoped>
.goodslist-container{
    background-color:#eee;
    overflow:hidden;
    .now_price{
        color:red;
        font-size:14px;
        font-weight:bold;
    }
    .mui-card-footer{
        display: block;
        button{
            margin: 10px 0;
        }
    }
    .ball{
        width: 15px;
        height: 15px;
        border-radius: 50%;
        background-color: crimson;
        position: absolute;
        z-index: 90;
        left: 138px;
        top: 390px;
    }
}
</style>